66770742 has 8 divisors (see below), whose sum is σ = 133541496. Its totient is φ = 22256912.

The previous prime is 66770723. The next prime is 66770777. The reversal of 66770742 is 24707766.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

66770742 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66770742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5564223 + ... + 5564234.

It is an arithmetic number, because the mean of its divisors is an integer number (16692687).

Almost surely, 2^66770742 is an apocalyptic number.

66770742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66770742 is a wasteful number, since it uses less digits than its factorization.

66770742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11128462.

The product of its (nonzero) digits is 98784, while the sum is 39.

The square root of 66770742 is about 8171.3366103716. The cubic root of 66770742 is about 405.6910257327.

The spelling of 66770742 in words is "sixty-six million, seven hundred seventy thousand, seven hundred forty-two".